<?php

	function ismobile() {
		// 如果有HTTP_X_WAP_PROFILE则一定是移动设备
		if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
			return true;
		//此条摘自TPM智能切换模板引擎，适合TPM开发
		if(isset ($_SERVER['HTTP_CLIENT']) &&'PhoneClient'==$_SERVER['HTTP_CLIENT'])
			return true;
		//如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
		if (isset ($_SERVER['HTTP_VIA']))
			//找不到为flase,否则为true
			return stristr($_SERVER['HTTP_VIA'], 'wap') ? true : false;
		//判断手机发送的客户端标志,兼容性有待提高
		if (isset ($_SERVER['HTTP_USER_AGENT'])) {
			$clientkeywords = array(
				'nokia','sony','ericsson','mot','samsung','htc','sgh','lg','sharp','sie-','philips','panasonic','alcatel','lenovo','iphone','ipod','blackberry','meizu','android','netfront','symbian','ucweb','windowsce','palm','operamini','operamobi','openwave','nexusone','cldc','midp','wap','mobile'
			);
			//从HTTP_USER_AGENT中查找手机浏览器的关键字
			if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
				return true;
			}
		}
		//协议法，因为有可能不准确，放到最后判断
		if (isset ($_SERVER['HTTP_ACCEPT'])) {
			// 如果只支持wml并且不支持html那一定是移动设备
			// 如果支持wml和html但是wml在html之前则是移动设备
			if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))) {
				return true;
			}
		}
		return false;
	}

//================================================================================
// 模版自定义函数
//================================================================================
	//模版自定义函数，切割用户名中间部分，显示省略号
	function mbstring($string,$left = 3,$right = 3){
		if(empty($string)) return $string;
		$len = strlen($string);
		if($len <= ($left + $right)) return $string;
		//截取开始
		$pre = substr($string,0,$left);
		$last = substr($string,-$right);
		return $pre . "..." .$last;
	}



?>